French energy giant EDF has announced a £1.1 billion investment in the Sizewell C nuclear power station in Suffolk, securing a 12.5% stake in the UK's flagship low-carbon energy project. This follows the UK government's previously confirmed £14.2 billion contribution, making it the majority stakeholder in the development.

Project Overview

Sizewell C is expected to be a cornerstone of the UK’s future energy infrastructure, with plans to generate low-carbon electricity for around 6 million homes. The plant will support up to 10,000 jobs at peak construction and offer 1,500 apprenticeships. The government sees the project as central to boosting energy security and reducing reliance on volatile fossil fuel markets.

Despite the benefits touted by the government, the project has drawn criticism from environmental groups. Campaigners argue that nuclear power’s long timelines and waste concerns make it less viable compared to other renewable options. Alison Downes of Stop Sizewell C has questioned EDF’s reduced stake, suggesting the UK is becoming overly dependent on foreign involvement for key infrastructure.

Stakeholder Developments

EDF, wholly owned by the French government, has reduced its stake in Sizewell C from 16.2% at the end of 2024 to 12.5%. Canadian investment firm Brookfield Corporation is expected to become the largest private investor, with plans to secure over 20% equity in the project. British Gas parent company Centrica is also in discussions to acquire a potential 15% stake.

Government Support

Prime Minister Keir Starmer hailed EDF’s investment as a step toward “lower energy bills, greater energy independence, and thousands of new jobs.” Energy Secretary Ed Miliband called it a cornerstone of the UK’s “golden age of nuclear energy,” intended to drive down costs and boost domestic energy resilience.

The announcement coincided with French President Emmanuel Macron’s state visit to the UK, underlining strong bilateral ties in energy and infrastructure development.